complete

Get argument autocompletion to shell commands. More information: https://www.gnu.org/software/bash/manual/html_node/Programmable-Completion-Builtins.html.

• Apply a function that performs autocompletion to a command:

complete -F function command

• Apply a command that performs autocompletion to another command:

complete -C autocomplete_command command

• Apply autocompletion without appending a space to the completed word:

complete -o nospace -F function command